The printer is not in Service Mode. Repeat the button sequence.

Release both buttons. The power light should blink and then stay solid green. Your printer is now in Service Mode. Using Canon Service Tool V5204 to Reset 5B00 Error Once your printer is in Service Mode, follow these steps: Open the Service_Tool_V5204.exe .

Furthermore, there is a significant technical risk to the hardware itself. The Service Tool is a powerful utility that operates at the firmware level. It contains settings that, if improperly applied, can permanently damage the printer's logic board. Versions of the tool are specific to certain printer models; using an incompatible version can "brick" the device, rendering it unrecognizable by any computer. Without the official training that accompanies the tool, a layperson is essentially performing surgery on their device with blunt instruments.

The Canon Service Tool V5204 is a "hot" item for a reason—it saves users from expensive repair bills or having to buy a new printer entirely. By following the Service Mode steps carefully, you can clear the 5B00 error and get back to printing in minutes.